SSB Configuration for Above 52.6 GHz Carrier Frequencies
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Solution Overview
Problem
The existing 5G new radio (NR) system faces challenges in synchronizing signal block transmission above 52.6 GHz carrier frequencies due to low power amplifier efficiency and large phase noise, requiring redesign of synchronization signals and physical broadcast channel (PBCH) configurations to reduce Peak-to-Average Power Ratio (PAPR).
Innovation Solution
The implementation of π/2-BPSK modulation for primary and secondary synchronization signals, along with Discrete Fourier Transform (DFT) or Fast Fourier Transform (FFT) for sequence generation and mapping onto subcarriers, and the redesign of PBCH and associated Demodulation Reference Signal (DMRS) to optimize transmission for carrier frequencies above 52.6 GHz, including specific sequence generation and mapping procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synchronization signal and PBCH configurations are used above 52.6 GHz, then transmission can be maintained, but power amplifier efficiency is low and phase noise is large
Solution Approach 1:
The patent applies parameter changes by modifying the modulation scheme from conventional QPSK to π/2-BPSK for synchronization signals and PBCH. This parameter change in modulation type reduces the Peak-to-Average Power Ratio (PAPR), which directly improves power amplifier efficiency in the frequency range above 52.6 GHz by reducing the peak power requirements while maintaining reliable transmission.
2Reliability
If conventional synchronization signal configurations are used above 52.6 GHz, then transmission can be maintained, but phase noise causes performance degradation
Solution Approach 1:
The patent employs parameter changes by implementing specific sequence generation methods using DFT/FFT-based approaches and carefully designed pseudo-random sequences. These parameter changes in sequence structure and modulation characteristics make the synchronization signals more robust against phase noise effects that are particularly severe above 52.6 GHz, thereby maintaining transmission reliability despite the harmful phase noise environment.
3Loss of energy
If PAPR is reduced through signal redesign, then power amplifier efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the signal processing into distinct modular components: separate sequence generation stages, DFT/FFT processing blocks, and π/2-BPSK modulation stages. This segmented approach allows each component to be optimized independently for low PAPR performance while keeping the overall system manageable and implementable, reducing the burden of complexity despite the signal redesign requirements.
Data Source
AI summary
Various embodiments herein provide techniques for synchronization signal block (SSB) configuration for wireless cellular networks. The SSB may be for carrier frequencies above 52.6 gigahertz (GHz). Other embodiments may be described and claimed.